Novel use of silicon nanocrystals and nanodiamonds in biology
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Anna Fucikova
,
Jan Valenta
Abstract
The presented work is aimed at the development of nontoxic nanocrystalline silicon fluorescence labels, biodegradable in living body and long-term stable, and of fluorescent nanodiamonds mainly for in vitro use. These novel fluorescence labels could be very good substitutes for commercially used quantum dots (e.g. cadmium compound quantum dots) which can be toxic according to the latest results. In this work, manufacturing of porous nanocrystalline silicon (por-Si) is described, several basic optical properties of por-Si are presented and the influence of Si nanocrystals, nanodiamonds, and milled silicon on the growth of a cell culture of L929 mouse fibroblast and HeLa cells is compared. Bio-interaction of nanoparticles was studied by optical transmission microscopy, time-lapse microphotography of cell culture evolution, fluorescence microscopy, fluorescence microspectroscopy, and scanning electron microscopy. The size and shape of nanocrystals were determined using atomic force microscopy (AFM).
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© 2009 Institute of Chemistry, Slovak Academy of Sciences
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Artikel in diesem Heft
- Utilization of solid phase spectrophotometry for the determination of trace amounts of copper using 5-(2-benzothiazolylazo)-8-hydroxyquinoline
- Analysis of spectinomycin in fermentation broth by reversed-phase chromatography
- An amperometric sensor for uric acid based on ordered mesoporous carbon-modified pyrolytic graphite electrode
- Utility of π-acceptor reagents for spectrophotometric determination of sulphonamide drugs via charge-transfer complex formation
- A graph theoretical approach to the effect of mutation on the flexibility of the DNA binding domain of p53 protein
- Aquaculture by-product: a source of proteolytic enzymes for detergent additives
- Effect of anthraquinone on brightness value and crystalline structure of pulp during soda processes
- Selection of a method for determination of activity of pectinolytic enzymes in berry fruit materials
- Study on polymeric micelles of poly(γ-benzyl l-glutamate)-graft-poly(ethylene glycol) copolymer and its mixtures with poly(γ-benzyl l-glutamate) homopolymer in ethanol
- Synthesis and characterization of mesoporous molecular sieves
- Growth mechanism and characterization of ZnO nano-tubes synthesized using the hydrothermal-etching method
- Novel use of silicon nanocrystals and nanodiamonds in biology
- Fluoride anion sensing using colorimetric reagents containing binaphthyl moiety and urea binding site
- Spectrophotometric methods for sertraline hydrochloride and/or clidinium bromide determination in bulk and pharmaceutical preparations
- Study of physicochemical properties-antitubercular activity relationship of naphthalene-1,4-dione analogs: A QSAR approach
- Spectroscopic study of protonation of oligonucleotides containing adenine and cytosine
- Rheological properties of doughs with buckwheat and quinoa additives
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